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山区城镇化、新农村建设、乡村振兴和脱贫攻坚大都面临着地质灾害的威胁,开展大比例尺地质灾害调查和风险评价,从源头控制地质灾害风险具有重要的战略意义。笔者在试点调查与评价的基础上,提出了一套山区城镇地质灾害调查与风险评价的思路和技术方法。山区城镇地质灾害调查与风险评价按照目的和比例尺精度的不同可分为3个层次:①区域远程地质灾害调查与风险评价,评价山区城镇遭受远程地质灾害的可能性,比例尺为1∶50 000。②城区地质灾害调查与风险评价,调查山区城镇周边区域每个斜坡和沟谷,评价其变形失稳的可能性及危害程度,比例尺为1∶10 000。③场地地质灾害调查与风险评价,评价重大工程建设、旅游景点等重要场地周边斜坡和沟谷变形破坏的可能性及危害程度,比例尺为1∶5 000~1∶2 000。对每个层次地质灾害调查与风险评价的内容、方法和过程进行了阐述,并以陕南秦巴山区和陕北黄土高原区典型山区城镇为研究区,建立了山区城镇地质灾害调查与风险评价应用示范。 相似文献
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<正>中国地质条件复杂,地质灾害严重,只有发挥新型举国体制优势,建立高效科学的地质灾害防治体系,全面提高地质灾害防治能力,才能确保人民群众生命财产安全。(1)围绕新型城镇化建设和乡村振兴战略,开展山区大比例尺地质灾害调查与风险评价。国际上大多发达国家已完成1∶1万地质灾害调查与风险评价工作,中国在地质灾害高易发区开展了1∶5万滑坡崩塌泥石流 相似文献
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为查明四川省甘孜藏族自治州地质灾害的发育特征及成灾机理,中国地质调查局成都地质调查中心于2010年在四川省甘孜州雅江县开展了以县域为单元的1∶5万地质灾害详细调查项目。项目以遥感、地面调查、测绘、勘查为主要工作手段,查明了该区域内地质灾害及其隐患的发育特征、分布规律及形成的地质环境条件。为了更好地利用这些数据,采用了规范的数据处理方法和质量控制体系,对调查的地质灾害数据进行整理和质量控制,该调查数据集提供了2010年雅江县行政范围内的327组地质灾害数据,调查精度达到1∶5万级别,有效地反映了区内地质灾害的发育特征与分布规律,可为该区域内工程地质研究、减灾防灾和制定区域防灾规划提供基础地质灾害依据。 相似文献
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强震区城市地质灾害风险管理的研究内容与方法探讨 总被引：3，自引：0，他引：3
地质灾害风险管理是一种寻求更加合理有效的地质灾害减灾防灾的理念和模式。随着山区城市化进程的加快,经济和人口在城市的相对聚集,加之强烈地震活动,使得山区城市面临风险不断地提高。研究强震城市风险管理,已成为当前城市防灾减灾工作的一项重大课题。本文概述了国内外研究进展,提出该研究方向的主要研究内容和研究方法。未来研究内容应该包括（1）强震区城市地质灾害风险结构与风险量化分析,（2）城市地震地质灾害风险判据研究与风险准则建立,（3）强震区城市地质灾害管制的途径和方法研究,（4）强震区城市地质灾害管制的效能监控机制研究,（5）强震区城市地质灾害风险管制的模式与规范体系研究。 相似文献
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云南省大关县地质灾害类型主要以滑坡、崩塌、泥石流为主。根据云南省最新重点区域地质灾害精细化调查与风险评价工作在大关县域共发现地质灾害点567处,比2015年1∶50 000详查工作新增灾害点203处。包括滑坡299处,崩塌210处,泥石流56条以及地面塌陷2处。本文借助地理信息系统(GIS)空间分析技术,结合最新的地质灾害精细化调查成果以及第三次全国国土调查数据,运用层次分析法及信息量法对云南省大关县的地质灾害进行风险性的评价及分区。研究结果可为云南省大关县地质灾害防治以及地质灾害风险管控提供依据。 相似文献
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地质灾害风险区划是地质灾害风险管理与防治的有效手段之一,对于科学防治地质灾害具有重要意义。基于自然灾害风险理论,从致灾因子危险性,承灾体暴露性和脆弱性以及防灾减灾能力（恢复力）等入手,选取评价指标,构建省级地质灾害风险评价模型,对全省地质灾害进行风险区划。该模型在吉林省地质灾害风险区划中应用表明,评价结果合理,与野外调查情况吻合,可以为规划和地质灾害防治等工作提供依据。 相似文献
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矿产资源勘查项目客观上面临地质灾害风险.本文以风险理论为主线,运用风险管理方法,通过理论演绎和案例分析,说明了加强矿产资源勘查项目地质灾害风险管理的必要性及其过程、评价方法和指标等. 相似文献
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本文从5个方面分析了甘肃省地质灾害风险管控面临的形势,在此基础上提出了重构包括生命至上、天人合一、主动而为、依法防灾等地质灾害风险管理科学理念,提出了地质灾害风险管理应遵循资源整合与系统设计、预防优先与抗救结合、分级防治与风险共担、工程治理与避险并重、政府主导与社会参与、应急处置与长效防范6项原则,提出了今后甘肃地质灾害风险管控应从发挥制度在地质灾害风险管控引领作用、打造积极的防灾减灾文化、推进地质灾害防治全民能力提高、强化地质灾害风险管控科技支撑、构建地质灾害隐患动态风险评估体系、加强空天地一体化专群结合监测预警网络建设、加大地质灾害综合治理力度、扩大避险搬迁覆盖面和实施力度、地质灾害防治纳入国土风险管控体系等8个方面的着力点。 相似文献
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通过对舒城县1∶5万县市地质灾害调查资料的收集,总结了舒城县不同地形地貌下地质灾害的分布、演化特征,借助研究不同地形地貌对地质灾害的影响特征,为预防地质灾害提供一定参考。 相似文献
11.
Emily Keeble David I. Whiteside Michael J. Benton 《Proceedings of the Geologists' Association. Geologists' Association》2018,129(2):99-119
Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco. 相似文献
12.
Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414. 相似文献
13.
The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts 总被引：4，自引：0，他引：4
The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H2O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H2O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species. 相似文献
14.
Muriel Rocher Stéphane Baize Stéphane Jaillet Edward Marc Cushing Yannick Lozac&#x;h Francis Lemeille 《Comptes Rendus Geoscience》2003,335(8):701-708
Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ1 roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003). 相似文献
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正20141756 Chen Ruige(Mathematical College,China University of Geosciences,Beijing100083,China);Zhou Xun Numerical Simulation of Groundwater Level Fluctuation in a Coastal Confined Aquifer with Sloping Initial Groundwater Level Induced by the Tide(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(7),2013,p.1099-1104,6 illus.,16 refs.) Key words:confined water,groundwater level 相似文献
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正20141408 Cai Jia(Institute of Geology,Chinese Academy of Geological Sciences,Beijing100037,China);Liu Fulai Petrogenesis and Metamorphic P-T Conditions of Garnet-Spinel-Biotitebearing Paragneiss in Danangou Area,Daqingshan-Wulashan Metamorphic Complex Belt(Acta Petrologica Sinica,ISSN1000-0569,CN11-1922/P,29(7), 相似文献
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正20142386An Guoying(China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing 100083,China)Application of Satellite Remote Sensing in Regional Hydrogeological Investigation:Taking Cenozoic Strata in Wenquan Sheet(1∶250 000)of Karakoram Range as an Example(Geosci- 相似文献
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正20141016An Chengbang(Key Laboratory of Western China’s Environmental Systems,Ministry of Education,Lanzhou University,Lanzhou 730000,China);Zhao Yongtao Lake Records during the Last Glacial Maximum from Xinjiang,NW China and Their Climatic Impli- 相似文献
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正20141538 Cao Qing(School of Earth Sciences and Engineering,Xi’an Petroleum University,Xi’an 710065,China);Zhao Jingzhou Characteristics and Significance of Fluid Inclusions from Majiagou Formation,Yichuan Huangling Area,Ordos Basin(Advances in Earth Science,ISSN1001-8166,CN62-1091/P,28(7),2013,p.819-828,7 illus.,3 tables,43 refs.) 相似文献